Circulate clean and warm air throughout your home with the Broan HRVH100SE Air Purifier, Heat Recovery Ventilator w/HEPA Filtration - Tan. This Air System combines HEPA filtration and ventilation to removes 99.7% microscopic particles, eliminate excess humidity during cold seasons and replace the gaseous pollutants of stale air by quietly replacing it with fresh, clean air. It may even relieve respiratory or irritated breathing symptoms, improving the quality of life for people who suffer from these conditions. The Broan HRVH100SE not only cleans your air, but it also preheats the air from outside your home before it circulates inside, offering you maximum comfort on those chilly fall, winter and spring days. It is an obvious energy-efficient choice with its ENERGY STAR certification!